21115980

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{73}}^1\times {\mathrm{1607}}^1$

素因数の和:1695

約数の個数: 72

約数和(自身を含む): 64969632

約数和(自身を除く): 43853652

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 73, 90, 146, 180, 219, 292, 365, 438, 657, 730, 876, 1095, 1314, 1460, 1607, 2190, 2628, 3214, 3285, 4380, 4821, 6428, 6570, 8035, 9642, 13140, 14463, 16070, 19284, 24105, 28926, 32140, 48210, 57852, 72315, 96420, 117311, 144630, 234622, 289260, 351933, 469244, 586555, 703866, 1055799, 1173110, 1407732, 1759665, 2111598, 2346220, 3519330, 4223196, 5278995, 7038660, 10557990, 21115980]

約数ペア:

[(1, 21115980), (2, 10557990), (3, 7038660), (4, 5278995), (5, 4223196), (6, 3519330), (9, 2346220), (10, 2111598), (12, 1759665), (15, 1407732), (18, 1173110), (20, 1055799), (30, 703866), (36, 586555), (45, 469244), (60, 351933), (73, 289260), (90, 234622), (146, 144630), (180, 117311), (219, 96420), (292, 72315), (365, 57852), (438, 48210), (657, 32140), (730, 28926), (876, 24105), (1095, 19284), (1314, 16070), (1460, 14463), (1607, 13140), (2190, 9642), (2628, 8035), (3214, 6570), (3285, 6428), (4380, 4821)]